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Added object module which provides some basic reflection capabilities
author Michael Pavone <pavone@retrodev.com>
date Thu, 17 Jul 2014 23:57:41 -0700
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children 123e9468d55e
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75dc7161c1ca Added object module which provides some basic reflection capabilities
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1 {
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2 rt <- #{
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3 llMessage: numMessages withVars: {
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4 intret <- obj_int32 ptr
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5 } andCode: {
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6 intret <- make_object: (addr_of: obj_int32_meta) NULL 0
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7 intret num!: (sizeof: methodNames) / (sizeof: (char ptr))
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8 intret
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9 }
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10
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11 llMessage: methodName withVars: {
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12 methodId <- obj_int32 ptr
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13 name <- string ptr
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14 namelen <- int
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15 } andCode: :methodId {
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16 name <- make_object: (addr_of: string_meta) NULL 0
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17 namelen <- strlen: (methodNames get: (methodId num))
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18 name bytes!: namelen
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19 name len!: namelen
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20 name data!: (GC_MALLOC_ATOMIC: namelen + 1)
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21 memcpy: (name data) (methodNames get: (methodId num)) namelen
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22 name
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23 }
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24
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25 llMessage: understands? withVars: {
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26 obj <- object ptr
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27 methodId <- obj_int32 ptr
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28 ret <- object ptr
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29 } andCode: :obj methodId {
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30 if: (object_understands: obj (methodId num)) {
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31 ret <- module_true
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32 } else: {
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33 ret <- module_false
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34 }
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35 ret
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36 }
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37
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38 llMessage: addUnderstood withVars: {
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39 obj <- object ptr
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40 arr <- object ptr
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41 methHash <- (uint32_t ptr) ptr
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42 methodId <- obj_int32 ptr
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43 slot <- int
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44 i <- int
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45 } andCode: :obj arr {
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46 methHash <- (obj meta) methods
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47 slot <- 0
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48 while: {slot < 16} do: {
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49 if: (methHash get: slot) {
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50 i <- 0
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51 while: { ((methHash get: slot) get: i) != 0xFFFFFFFF } do: {
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52 methodId <- make_object: (addr_of: obj_int32_meta) NULL 0
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53 methodId num!: ((methHash get: slot) get: i)
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54 mcall: append 2 arr methodId
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55
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56 i <- i + 1
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57 }
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58 }
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59
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60 slot <- slot + 1
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61 }
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62 arr
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63 }
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64 }
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65 getMethodDict <- {
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66 methodDict <- dict hash
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67 i <- 0
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68 n <- rt numMessages
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69 while: { i < n } do: {
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70 name <- rt methodName: i
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71 methodDict set: name i
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72 i <- i + 1
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73 }
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74 getMethodDict <- {
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75 methodDict
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76 }
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77 methodDict
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78 }
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79 #{
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80 does:understand? <- :obj :message {
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81 d <- getMethodDict:
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82 d ifget: message :messageId{
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83 rt understands?: obj messageId
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84 } else: { false }
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85 }
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86
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87 understoodBy <- :obj {
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88 ids <- rt addUnderstood: obj #[]
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89 ids map: :id {
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90 rt methodName: id
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91 }
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92 }
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93 }
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94 }